Earnings Per Share (Weighted-Average Shares of Common Stock Outstanding used in Calculation of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Net income (loss) attributable to SBA Communications Corporation	$ 188,623	$ (11,745)
Basic weighted-average shares outstanding	108,086	109,469
Dilutive impact of stock options, RSUs, and PSUs	1,458
Diluted weighted-average shares outstanding	109,544	109,469
Net income (loss) per common share attributable to SBA Communications Corporation:
Basic	$ 1.75	$ (0.11)
Diluted	$ 1.72	$ (0.11)